Sewing-machine.



G. B. OSTERHOUT.

SEWING MACHINE.

APPLICATION FILED SEPT-30, 1913. 4 1,1 4,43 7 Patented Apr. 6, 1915..

I LU nah t I r G. B. OSTERHOUT.

SEWING MACHINE.

APPLICATION min SEPT. 30. 1913;

Patented Apr. 6, 19m

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PATENT @Fi-FXCE.

GARRET B. OSTEBHOUT, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO WILLCOX &

GIBBS SEWING MACHINE (30., OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

SEVTING-MAGHINE.

Specification of Letters Patent.

Patented Apr, 6, H915,

Application filed September 30, 1913. .Serial No. 792,676.

To all whom it may concern Be it known that If, GARRET B. Os'rnR-110131, a citizen of the United States of America, and resident ofProvidence, Rhpde Island, have invented a new and useful improvement inSewing-Machines, which m provement is fully set forth in the followingspecification.

This invention relates to sewing machines, and more particularly toparts designated as the loop-shedder and loop-spreader in machines ofthe character disclosed in the patents to S. Borton, No. 1,041,574, andA. A. Merritt, No. 1,05,652, both dated October 15th, 1912.

The objects and character of the invention may be most readilyunderstood by reference to the accompanying drawings illustrating whatis now regarded as the preferred embodiment thereof, and where- Figure lis a vertical sectional view through the end of the work-arm of themachine and stitch-forming parts associated therewith; Fig. 2 is asimilar view with the parts in a different position of their movement;Fig. 3 is a detail view of the feed-member on which the loop-shedderblade or lip is formed; Fig. 4 is a similar detail in which a rod orwire forms the loopshedding edge; and Figs. 5 and 6 are detail views ofthe loop-spreader.

10 is a part of the end of a hollow workarm, upon the upper surface ofwhich is mounted a work-plate or throat-plate 11.

12 is a main presser-foot,y13 an auxiliary resser-foot, and 1 1 needles(of which there are four, only one showing in the drawings) workingthrough a slot in the main presserfoot 12.

15 is a looper lever, only the forward end of which is shown, on whichis pivotally mounted a looper carrier 16, to which there is fixed fourloopers 17 (only one of which shows in the drawings) adapted tocooperate with the four needles 1 1 respectively.

18 is a loop-check and needle-guide fixed to the side wall of the hollowwork-arm 10 and positioned just above the end of looper lever 15 and thelooper carrier 16 thereon.

The parts thus far described in detail are of substantially the sameconstruction as the corresponding parts of the Merritt Patent No.1,041,652, before mentioned, to which reference is made for a moredetail explanation of their construction and operation. As in saidMerritt patent, the drawings herein show a double feed, that is to say,two separate feed devices or surfaces which slightly differ in theirrelative movements, one acting on the work before it reaches the needlesto give what is known as a fulling feed, and the other acting on thework after it has passed the needles to give the stitch feed. 7

As illustrated in Figs. 1 and 2, 20 is the fulling feed member and 21the stitch feed member; each has a shank or foot by which it issecured'by a screw 22 (see dotted lines Fig. 1) to the forward end of afeed lever, there being one such lever for each feed member. The meanswhereby such feed levers and their associated feed members are givendifferent relative movements which may be relatively adjusted and variedfor different characters of work being done by the machine or fordifferent thicknesses of goods and length of stitch, may be readilyunderstood by reference to the aforesaid Merritt patent. A dotted lineellipse 23 in Figs. 1 and 2 illustrates the approximate path of movementof the stitch feed member 21.

In the aforesaid Merritt patent, there is shown a loop-shedder in theform of a projecting flange or lip secured to the under side of thethroat-plate across the rear edge of the needle opening therethrough. Inaccordance with the present invention, the loopshedder is associated andmovable with the stitch-feed member. 21, and in Figs. 1, 2 and 3 isshown in the form of a slightly inclined lip or blade 24 extending fromthe toothed portion of the feed member 21 rearwardly toward the needlesand across the opening 25 in said feed member through which the needlesoperate. It has been found that the movement imparted to the stitch-feedmember 21 is a desirable movement for a loopshedding blade, such as 24,and that by imparting such movement to the loop-shedder it acts moreeffectively and with greater certainty in pushing the loops ofneedle-thread off the loopers 17 at the proper time in thestitch-forming cycle than when the loopshedder is an immovable partsecured to some fixed portion of the machine. In said Merritt patentthere is shown a loop-spreader having at it forward end threehorizontally projecting teeth adapted to engage the looper threads toproperly spread the loops thereof tobe entered by the descending neevd-les. In accordance with the present invention, three teeth 26, 27 and28' are formed to project downwardly from the under side of the endofthe loop-spreader 29 and are inclined slightly toward the direction(indr cated by the arrow 30 in Fig. 5) in which the end of saidloop-spreader 29 moves in en gaging the looper-threads and spreading thesame for the needles to enter the loops thereof. With this formation'ofthe teeth, it is found that they engage, hold, and release thelooper-threads with greater certainty of action at the high speeds atwhich machines of this type are operated. At its opposite end, theloop-spreader 29 has a circular open ing engaging around a circularflange 31 about an opening 32 through tailpiece 33. A screw 34 rigidlysecures the spreader 29 to the tail-piece 33. A pivot-screw 35 passesthrough the opening 32 into a bracket 36 which is rigidly secured to andprojects from the side wall of the hollow work-arm. A

depending roller 37 works in a cam-shaped groove of apart 38 fixed by ascrew '39 to the looper-lever 15. The elliptical movement of the forwardend of the looper-lever 15 carrying with it the part 38 with its.camshaped groove engaging the'roller 37, imparts to the loop-spreader 29a pivotal movement about the screw-pivot 35 causing the toothed end ofthe loop-spreader to swing back and forth transversely to the work-arm,such movement being properly timed with relation to the movements of theloopers and needles.

In Fig. 1 with the parts moving in the directions indicated by arrows,the points of. the needles have penetrated the work, the loopers 17 aremoving in a direction to disengage themselves from the loops ofneedlethreads, the loop-spreader with its teeth en-- gaging the looperthreads is moving in a direction to spread the loops in said threads,the stitch-feed member 21 is moving toward the needles, and the edge ofthe loop-shedder blade 24 is in contact with the loops ofneedle-threads. In Fig. 2, these parts have moved further in the samedirections, until the edge of blade 24 is about to disengage theneedle-thread loops from the loopers and the needles have descended intoloops of looper threads spread by the spreader 29.

, Instead of a blade or lip 24, the loop-shedder applied to thestitch-feed member may take the form of a rod or wire 40, Fig. 4, whichwill provide the necessary edge or part to engage the needle-threadloops and push them off the loopers. Furthermore, the

- movable loop-shedder of this invention may,

be embodied in forms other than those illus trated by way of example,and said'loopshedder need not necessarily be a part of a feed-member.

What I claim is 1.'The combination with one or more loopers and meansfor imparting thereto loop-taking and releasing or shedding movements;of a movable loop-shedder adapted to contact loops of thread on thelooper or loopers and by its movement to push said loops toward thepoint of the looper or loopers while the latter are making theirreleasing or shedding movement; and means for actuating saidloop-shedder.

2. The combination with one or more loopers and means for impartingthereto loop-taking and releasing or shedding movements; of a movableloop-shedder adapted to contact and push toward the point of the looperor loopers loops of thread on the latter, and means for actuating saidloopshedder causing it to advance toward the point of the looper orloopers simultaneously with the receding or releasing movement of thelatter.

3. The combination with one or more parallel to the line of feed andadapted to contact and by its movement push toward the point of thelooper or loopers loops of thread on the latter; and means for actuatingsaid loop-shedder.

5. The combination with one or. more loopers and means for impartingthereto.

loop-taking and releasing or shedding movements; of 'a feed-memberhaving a part adapted in the movement of said member to contact and pushtoward the point of the looper'or loopers loops' of thread on thelatter.

6. The combination with one or more loopers and means for impartingthereto loop-taking and releasing or shedding movements; of afeed-member having thereon a loop-shedding lip adapted in the movementof said member to contact and push toward the point of the looper orloopers loopsv of thread on the latter.

7. The combination with' a plurality of appropriately driven needles; ofmeans-ineluding a plurality of loopers and a loopspreader havingdownwardly projecting thread-engaging teethadapted to project loops ofstitch-forming looper threads through loops of thread projected by eachof two needles from one side of the seam' 8. The combination of aplurality of appropriately driven needles; a throat-plate; one or aplurality of loopers and driving connections for operating the same in aplane approximately parallel to the throatplate; and a loop-spreaderhaving downwardly projecting thread-engaging teeth and drivingconnections for moving the same in a plane approximately parallel to thethroat-plate on an axis approximately perpendicular to saidthroat-plate.-

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

GARRET B. OSTERHOUT.

Witnesses:

' W. T. LIDDALL,

L. P. DRUMMOND.

